ANOVA (ANalysis Of VAriance) test used to compare the means of more than 2 groups, whilst t-test can only be used to compare 2 groups. ANOVA uses variance-based F test to check the group mean equality. There are two main types of ANOVA, one-way (one factor) and two-way (two factors) ANOVA.

A linear regression to modelling the relationship between a scalar response and one or more explanatory variables is known as linear regression in statistics (also known as dependent and independent variables). Simple linear regression is used when there is only one explanatory variable; multiple linear regression is used when there are more than one.